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Nutanix Kubernetes Engine

Kubernetes Management Made Simple

  • 110 Topics
  • 302 Replies

Backing Up Karbon Kubernetes clusters with Velero and Nutanix Objects

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Latest Nutanix Karbon How-To Videos

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Tillerless Helm on Nutanix Karbon

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110 Topics
Jubran
Nutanix Employee
JubranNutanix Employee
posted in Nutanix Kubernetes Engine
How to setup and use Karbon

What is Karbon? Nutanix Karbon is a curated turnkey offering that provides simplified provisioning and operations of Kubernetes clusters. Kubernetes is an open source container orchestration system for deploying and managing container-based applications. The Karbon web console simplifies the deployment and management of Kubernetes clusters with a simple GUI and built-in event monitoring tools. There are built-in add-ons such as Kibana and Prometheus for parsing logs and monitoring alert triggering mechanism in you cluster. Using Karbon you can:  Deploy Kubernetes clusters. Use Nutanix Volumes and Nutanix Files storage for your applications. Manage Kubernetes cluster resources. Upgrade your Kubernetes deployment. Ensure high-availability. To set up your Karbon environment, perform the following tasks: Enable Karbon through Prism Central, Enabling Karbon Download an image, see OS Images Create clusters, see Creating a Cluster Download the kubeconfig, Downloading the Kubeconfig Configure

8
J
3 years ago
Anibal Ulisses
Anibal UlissesTrailblazer
asked in Nutanix Kubernetes Engine
Manually adjust the kube-apiserver?

Hi, It’s possible to manually adjust the file /var/nutanix/etc/kubernetes/manifests/kube-apiserver.yaml and apply this update into the kubernetes cluster? I tried to adjust and after run: sudo systemctl daemon-reload && sudo systemctl restart kubelet-master But when I describe the kube-api pod I see that the adjusts are not applied. Anibal

19
Anibal Ulisses
4 years ago
clindevall
clindevallVoyager
posted in Nutanix Kubernetes Engine
Renewing cluster kubeconfig from the command line

Just wanted to share how we are renewing the kubeconfig from the command line. Background: In our organization it was considered a bit clumsy to download the kubeconfig from the Karbon UI. We love the command line and wanted a quick’n’easy way to renew the authentication token. The solution: We created a docker image that contains the “karbonctl” binary and a wrapper script. The Dockerfile was also included into our CI/CD pipeline to automate the image creation. The wrapper script does two things: karbonctl login --pc-ip prism.nightingale.nu --pc-username “$1” karbonctl cluster kubeconfig --cluster-name “$2” >”$3” The commands that the end user run: docker run --rm -it -v “$(pwd)”:/tmp docker.registry.local/karbonctl:latest <login> mycluster /tmp/karbon.cfg export KUBECONFIG=”$(pwd)/karbon.cfg”  

14
mikkisse
3 years ago
JoseNutanix
Nutanix Employee
JoseNutanixNutanix Employee
posted in Nutanix Kubernetes Engine
Backing Up Karbon Kubernetes clusters with Velero and Nutanix Objects

Disclaimer: This post is intended for demo purposes and must not be considered production ready. Velero is not included in Nutanix Karbon, hence Nutanix support won’t handle any case related to Velero. OverviewOne of the main principles of containerised applications is stateless. The reason is not make this application portable and non dependant of any data. In this way you can re-use the same container image on any platform with the same result. Because containers started to gain popularity because the portability, scalability, and so on, the community found out a way to containerise stateful applications like databases with the use of local storage, or shared volumes. Recover stateless applications is a very straightforward process, you just need to re-apply your manifest file in another cluster. You just need to make sure your manifest file is up-to-date with the latest state running in your cluster. Remember you shouldn’t make changes directly in your cluster, you should update you

0
JoseNutanix
Nutanix Employee
4 years ago
JoseNutanix
Nutanix Employee
JoseNutanixNutanix Employee
posted in Nutanix Kubernetes Engine
Tillerless Helm on Nutanix Karbon

What is Helm?Helm is a tool that simplifies how your IT operation team install and manage Kubernetes applications. You could consider it like a package manager in Linux (apt/yum) but for Kubernetes. What is a Helm chart?A Helm chart is just a package that contains the Kubernetes application. This is similar to a .deb/.rpm package on your preferred Linux distribution. What are the Helm use cases?If you are wondering why use Helm is a good idea, here some of the reasons:Most of the popular software has a Helm chart to facilitate its installation on Kubernetes If you are looking to share your own Kubernetes application, a Helm chart is the way to go Consistency during deployments is a key aspect, charts bring reproducible builds of your applications Kubernetes applications are a group of manifest files. A chart helps you to manage the complexity of those Kubernetes manifest files Manage releases of Helm packagesHelm architectureFrom Helm website:Helm has two parts: a client (helm) and a s

2
aluciani
4 years ago
J
jmoroAdventurer
asked in Nutanix Kubernetes Engine
Karbon deployment Failed: failed to deploy the ntnx dvp

Deploying a karbon cluster we got this error on 8% of process:Deployment Failedinvalid argument: internal error: internal error: failed to deploy the ntnx dvp: Failed to configure with SSH: Failed to run command: on host: "xx,xx,xx,xx:22" error: "Process exited with status 1"Has anyone the same problem? Any idea on how to advance?Regards.Javier

4
J
5 years ago
Anibal Ulisses
Anibal UlissesTrailblazer
asked in Nutanix Kubernetes Engine
Karbon integration with GitLab

Hi, someone have experience integrating GitLab with Karbon? Basically I’m looking for automatic deployment from gitlab to karbon.

6
Anibal Ulisses
4 years ago
JoseNutanix
Nutanix Employee
JoseNutanixNutanix Employee
posted in Nutanix Kubernetes Engine
Kubernetes Dashboard on Nutanix Karbon

With the release of Nutanix Karbon TP, PC 5.9, you may want to deploy some of the traditional addons like [b]Kubernetes Dashboard with Heapster[/b]. This post walks you through the process to successfully deploy the Kubernetes Dashboard addon. Before you can start with the deployment of the addon you need a working Kubernetes cluster and the [b]kubectl[/b] CLI-tool. The steps to follow are: [list=1] [*]Deploy Heapster [*]Deploy Kubernetes Dashboard [*]Connect to Kubernetes Dashboard [/list] [h2]Deploying Heapster[/h2]From Heapster website: [i]Heapster enables Container Cluster Monitoring and Performance Analysis for Kubernetes (versions v1.0.6 and higher), and platforms which include it.[/i] [b][i]Heapster is deprecated[/i][/b][i]. Consider using metrics-server and a third party metrics pipeline to gather Prometheus-format metrics instead. See the[/i] [url=https://github.com/kubernetes/heapster/blob/master/docs/deprecation.md][i]deprecation timeline[/i][/url][i] fo

8
R
5 years ago
H
HongAdventurer
asked in Nutanix Kubernetes Engine
How to Karbon configure

I'm testing Karbon. I'm very basic level. I can't make it through the karbon configure testing, so I'll ask you for help. I've upgraded Karbon to the latest version through LCM. After that, I set it up through "Create Kubernets Cluster." That's the problem from here. In the end, an error occurs in the "Deployment Failed" status section. Deploying 8% has an error. I looked up various information. I looked it up, and I think you should setting Proxy http and ERCD. How can setting? Please explain in detail the reason why Karbon can't be distributed. Thank you.

6
seaton
5 years ago
aluciani
alucianiChevalier
posted in Nutanix Kubernetes Engine
[Docker] Nutanix Container Volume Plug-in

For those running Docker, check out > [url=http://dockr.ly/2lZ50Hw]Nutanix Container Volume Plug-in[/url] on the Docker store. Nutanix Volume Plugin enables container persistent storage. Try it out today and let me know your experience. [img]https://d1qy7qyune0vt1.cloudfront.net/nutanix-us/attachment/2548iF0A241E0F3BB3D7D.jpg[/img]

16
aluciani
6 years ago
K
KeoNaaneAdventurer
asked in Nutanix Kubernetes Engine
Karbon Nodes TimeZone

Hi all  We have karbon clusters running in our Nutanix environment, and I noticed the timezone in the Karbon cluster is not the same as that in other VMs on the Nutanix cluster.  The time zone set for the Nutanix cluster is SAST (UTC +2), and the Karbon VMs timezone is UTC (UTC +0).  The UTC+0 timezone is only on the Karbon Nodes.  It seems it doesn’t use the Nutanix Cluster’s timezone, our logs are 2 hours behind on Karbon Clusters(all 3 cluster).  Is there a way to change the timezone for Karbon?  

8
AnishWalia20
Nutanix Employee
4 years ago
Anibal Ulisses
Anibal UlissesTrailblazer
asked in Nutanix Kubernetes Engine
Enable PodPreset

Hi, Someone know if we can enable PodPreset on the Karbon? (https://kubernetes.io/docs/concepts/workloads/pods/podpreset/#enable-pod-preset) Basically my cluster are under a Proxy and I can’t deploy application under Pod because they need to access the internet, with the PodPreset I can configure the proxy information like this https://docs.gitlab.com/ee/topics/autodevops/index.html#installing-helm-behind-a-proxy

12
Anibal Ulisses
4 years ago
B
bpendletonVoyager
asked in Nutanix Kubernetes Engine
Kubernetes 1.10.8 RPC Error When Trying To Mount

Warning FailedMount 1s kubelet, ntnx-cluster-k8 MountVolume.SetUp failed for volume "pvc-c443c7a5-c8ef-11e8-8d6e-0050569c316b" : rpc error: code = DeadlineExceeded desc = context deadline exceeded Using a support K8 version 1.10.8, deployed with kubeadm, I can get the nutanix volume to be created from the K8 request, however I receive the above error and cannot seem to find this answer anywhere. I am not sure what its timing out on? Anyone else see this in the wild.

1
B
5 years ago
MVerhaeghe
MVerhaegheVoyager
asked in Nutanix Kubernetes Engine
Karbon API Deployment - Autentification Error

Hi all,  I tried to deploy a Karbon Development Cluster by using Karbon API, but I encounter an error with authentication.    {"message_list":{"Unauthorized":"Failed to get authentication info"},"status_code":401} The command for calling Karbon API is :  curl -k -X POST -d @create-cluster-dev.json --header "Content-Type: application/json" --header "Accept: application/json" --user $NUTANIX_USER:$NUTANIX_USER_PASS "https://xxx.xxx.xxx.xxx:9440/karbon/acs/k8s/cluster"   When I try to use other Prism API command, like cluster or vm with these command below,, everything works fine, so I don’t think that my login/password are wrong. I haven’t seen much more into nutanix log file, but maybe i’m looking at the wrong place (/data/logs).  curl -k -X POST -d @nutanix-list-cluster.json --header "Content-Type: application/json" --header "Accept: application/json" --user $NUTANIX_USER:$NUTANIX_USER_PASS "https://xxx.xxx.xxx.xxx:9440/api/nutanix/v3/clusters/list"   Has anyone encountered th

6
AnishWalia20
Nutanix Employee
4 years ago
aluciani
alucianiChevalier
posted in Nutanix Kubernetes Engine
Latest Nutanix Karbon How-To Videos

Nutanix Karbon is an enterprise-grade Kubernetes Certified distribution that simplifies the provisioning, operations and lifecycle management of Kubernetes with a native Kubernetes experience. Karbon makes it simple to deploy a highly available Kubernetes cluster and operate web-scale workloads. Check out our latest ‘How To’ video :thumbsup: [h3]Tech TopX: Kubernetes Persistent Storage with Nutanix Karbon[/h3]In this video, Michael Haigh walks through using the integrated CSI driver to provide persistent storage to a production grade Kubernetes cluster with Nutanix Karbon. [video]https://youtu.be/U8CvRYaQywU[/video] [h3]Tech TopX: Kubernetes Cluster Scaling with Nutanix Karbon[/h3]In this video, Michael Haigh walks through scaling a production grade Kubernetes cluster with Nutanix Karbon. Karbon simplifies the provisioning and life cycle management of Kubernetes clusters, freeing administrators and operators from manual and tedious tasks, and enabling developers to focus on

2
aluciani
4 years ago
W
wfhartfordVoyager
asked in Nutanix Kubernetes Engine
Storage Class User for Karbon

I'm trying to configure a new Kubernetes cluster using Karbon. When I get to the stage of configuring the storage class, I'm prompted for a user name and password. I'm not sure which user I should be entering here, as the few I've tried don't seem to work. The cluster setup tutorial video shows the username `admin`, which seems to suggest using a very highly privileged user, which seems unnecessary to me. How can I create a user with the minimum privileges necessary for the storage class?

5
vshuguet
Nutanix Employee
5 years ago
Anibal Ulisses
Anibal UlissesTrailblazer
asked in Nutanix Kubernetes Engine
Use internal ca certificate chain on Karbon

Hi, My company have a internal CA certificate chain and I need to install the internal ca.crt on Karbon, it’s possible? Use case, install a pod using kubectl from a internal registry are not possible due they didn’t know the root CA authority installed at the registry server. Anibal

6
AnishWalia20
Nutanix Employee
4 years ago
JoseNutanix
Nutanix Employee
JoseNutanixNutanix Employee
posted in Nutanix Kubernetes Engine
Istio Service Mesh on Nutanix Karbon

[b]Disclaimer[/b]: This post is intended for demo purposes and must not be used for production clusters. Istio is not included in Nutanix Karbon today, hence Nutanix support won’t handle any case related to Istio. [h1]What is a service mesh?[/h1]When transitioning from monolithic applications to a distributed microservice architecture the number of services dramatically increases. This decentralisation at scale makes it difficult for developers and operators to enable service-to-service communications. Service meshes enable service-to-service communications providing connectivity, security, control and observability. [img]https://d1qy7qyune0vt1.cloudfront.net/nutanix-us/attachment/9d364aad-f1b0-444f-9759-ce0a6f83a210.png[/img] Source: [url=http://blog.microtica.com/2017/03/what-are-microservices-actually/]Microtica[/url] [h1]What is Istio?[/h1]From Istio website: [i]“At a high level, Istio helps reduce the complexity of these deployments, and eases the strain on your d

0
JoseNutanix
Nutanix Employee
5 years ago
aluciani
alucianiChevalier
posted in Nutanix Kubernetes Engine
Kubernetes Cluster Deployment with Nutanix Karbon

[video]https://youtu.be/BUb9weyoLnk[/video] Are you interested in deploying production grade Kubernetes clusters in your on prem data center? Well, with Nutanix Karbon, you can quickly provision, manage, and operate your Kubernetes clusters all with the Nutanix Prism. Let's get started. Now that Karbon is general availability, we'll just gonna go ahead and click on the menu button, and then down to services, and then Karbon. If Karbon is not enabled in your environment, there'll be a button here to press to enable it and it'll get spun up in about 5 to 10 minutes as a couple of docker containers which lives on the Prism central VM. Since mine is already enabled, I'm gonna click on the link to take me to the Karbon console. Now that that's opened up, I'm gonna go ahead and create a Kubernetes cluster. We're gonna get started here working through the development cluster workflow. All of these settings are configurable, as we'll see. I'm gonna actually come back and deploy a produ

0
aluciani
5 years ago
aleksei_p
aleksei_pVoyager
asked in Nutanix Kubernetes Engine
Karbon deployment with nvidia drivers

Today Karbon deploy K8s cluster (as a service) without extra features. We are using GPU pass-through, so when we get bare k8s cluster there are need for extra deployments (manually)  just to make GPU accessible as a resource to K8s-cluster. anything in road map for dealing with this? desired state is to mark node as GPU-Node and all driver and plugins installation will be performed by Karbon (including different cuda driver versions)    

2
aleksei_p
4 years ago
aluciani
alucianiChevalier
asked in Nutanix Kubernetes Engine
Cool GitHub Project: Kubernetes and Nutanix

Cool GitHub project - Kubernetes installation tools for Nutanix. Give it a try and add your comments in this forum. I'm sure [url=http://next.nutanix.com/member/profile?mid=25525]RedDevil[/url] would like to hear your feedback. Download here: [url=https://github.com/nutanix/k8s]https://github.com/nutanix/k8s[/url]

17
R
5 years ago
Winson_Sou
Nutanix Employee
Winson_SouNutanix Employee
posted in Nutanix Kubernetes Engine
Deploying Prometheus on Nutanix Karbon

This is the first of a three-part blog post on deploying monitoring addons with Nutanix Karbon. Nutanix Karbon is a curated turnkey offering that provides simplified provisioning and operations of Kubernetes clusters. Kubernetes is an open-source container orchestration system for deploying and managing container-based applications. Karbon was released in Tech-Preview after the launch of AOS 5.9 and Prism Central 5.9 in October 2018. We’ve received several queries from our customers, partners and peers alike who value the simplicity that we bring to the table for Kubernetes, but they find it hard to understand how the cluster is behaving and what is going on under the covers. Enter [url=https://prometheus.io./]Prometheus[/url] (also known as Prom or P8s). Prometheus is an open-source monitoring tool that was built by a team at SoundCloud and it was inspired by Google’s [i]Borgmon[/i], it was designed from day one for the Kubernetes model of assigning and managing units

1
Winson_Sou
Nutanix Employee
5 years ago
K
KeoNaaneAdventurer
asked in Nutanix Kubernetes Engine
How to renew Karbon cluster's kubeconfig dynamically?

Hi all Since kubeconfig is only valid for 24hours, is there a way to renew it automatically on expiry? An API call maybe? Using the same credentials to login on the Karbon Console? The idea is to automatically update the kubeconfig from our CI/CD pipeline to deploy to Kubernetes. Please also share, if there is, best practices for integrating Karbon clusters with Jenkins CI/CD pipeline. I thank you

2
K
5 years ago
K
KeoNaaneAdventurer
asked in Nutanix Kubernetes Engine
NCC Checks - Volume Groups

Hi all When doing NCC checks, I get a report(example1) that some volume groups usage is high (95%). example1: Detailed information for vg_space_usage_check: Node 10.x.x.x: FAIL: Volume Group pvc-xxxxxx-9xxx-11x9-bf59-xxxxx8d87c391 space usage (95 %) above 90 % _ The volume group is mounted to Kubernetes pod running in a Karbon cluster. My issue is that, when checking usage of the volume group from within the kubernetes pod, I get different usage results, current stats are 24% used, 76% free. The NCC check and the manual check results don't match. NOTE: There is a clean-up mechanism, so disk usage does go up and down. I have re-ran the ncc checks several times, they yield the same stats (95% usage), thou the usage from the pod is 24%(currently). Can you please elaborate on how the NCC vg_space_usage_check work? And what else to look at to further investigate the mismatch of stats. Tx

5
dlink7
5 years ago
K
KeoNaaneAdventurer
asked in Nutanix Kubernetes Engine
Access Karbon Volumes from outside k8s cluster

Good dayI have a few questions regarding PVs on Karbon Clusters.Is there a way to access Persistent Volumes created by Kubernetes besides getting to it from within the pod the volume is mounted? If the PV has status Released, can I still be able to access it without having to bind it again?Basically, I want to know if the data on Karbon PVs can be accessed via ssh, or something else other than K8s pods. If backups are saved on a PV, can I access the data from another VM besides the cluster worker nodes?

1
vshuguet
Nutanix Employee
4 years ago

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